the leadscrew is used for thread cutting on a lathe
Leadscrews are commonly used in machinery to convert rotary motion into linear motion. They are also used for precision positioning in equipment such as CNC machines, 3D printers, and camera sliders. Leadscrews are preferred for applications that require high accuracy and repeatability in moving components.
An acme thread is the most commonly used.
Sometimes the propeller on a boat is called a screw & they used to be made of lead. So they would be found at the end of the propeller shaft.
presuming you mean the lead screw on a lathe, used when cutting threads on the workpiece, then the screw itself is obviously fixed, but the rotation of it may be able to be changed, depending on the lathe manufacturer.
screw
The feed rod transmits power from the headstock to the carriage for feeding operations.The lead screw transmits power from the headstock to the carriage for screw thread cutting operations. On some lesser types of lathes the feed rod and the lead screw are used for both the feed and the screw cutting power transmission.
when lead of the screw is equal to the pitch it is called single threaded screw
A lead screw is used to convert rotary motion into linear motion. It is commonly used in machinery where precise linear movement is required, such as in CNC machines, 3D printers, and automotive applications.
Lead screws (always pronounced "LEED," as in the present tense of the verb "to lead") are used in mechanical transmission systems to convert rotary motion to controlled linear motion. A common example is in the machinist's screw-cutting lathe. Here a motor turns the lathe's headstock to rotate the piece being machined. A train of gears connected to the headstock turns the lead screw which is usually as long as the entire lathe. As the lead screw turns it propels the cutting tool along the workpiece at a rate directly linked to the rotation of the headstock.
§ Screw threads have better compression strength than other threads. § Due to low thread angle there is no radial pressure on nut. § Due to smaller angle, the lead of screw is less.
§ Screw threads have better compression strength than other threads. § Due to low thread angle there is no radial pressure on nut. § Due to smaller angle, the lead of screw is less.
A lead screw is a type of screw that converts rotational motion into linear motion. As the screw is turned, it moves along its axis, allowing it to move a nut or other component in a straight line. This mechanism is often used in applications where precise linear motion is required, such as in CNC machines and 3D printers.